JP7260138B2 - water heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water heater and an identification tool for the water heater.

2. Description of the Related Art Conventionally, there has been provided a water heater that heats water introduced from the outside by transferring heat generated by combustion with a gas burner to boil water. For example, the hot water supply apparatus disclosed in Patent Document 1 includes a case 5 that houses a gas burner 4, a water passage, and the like. A second exposed conduit 17 with an outlet 18 is provided.

A first external pipeline 190 (for example, a pipeline for supplying water from a tap) is connected upstream to the first exposed pipeline 15 , and a second external pipeline 190 is connected downstream to the second exposed pipeline 17 . An external conduit 290 is connected. A water filter 35 is provided in the inner space of the first exposed pipe line 15, and this water filter 35 allows the water flowing from the water inlet 16 to move downstream, and removes foreign substances mixed in the water. from migrating downstream.

JP 2018-112252 A

Like the first exposed pipeline 15 and the second exposed pipeline 17 in the hot water supply apparatus disclosed in Patent Document 1, the hot water supply apparatus has a pipeline exposed on the hot water outlet side and a pipeline exposed on the water inlet side. , common shapes, similar shapes, or other misleading relationships, and there is a risk of misconnecting them during installation, maintenance, or the like.

As a measure to prevent such erroneous connection from occurring, Patent Document 1 exemplifies an identification tool for a hot water supply apparatus having a water inlet side display member 110 and a hot water outlet side display member 120 . For example, the water inlet side display member 110 includes a first plate-like member 112 that displays at least one of a symbol or a figure indicating water, and a first mounting member 114 that is a member for mounting the first plate-like member 112. and The water inlet side display member 110 is bent while a belt-like or string-like first mounting member 114 is inserted into the long hole portion 112b of the first plate-like member 112, and both ends of the first mounting member 114 are bent. It is attached so as to be engaged with a protruding portion 19 a protruding from the outer peripheral portion of the first exposed pipeline 15 .

In the configuration disclosed in Patent Document 1, there is a possibility that the first mounting member 114 will fall off the projection 19a and the water inlet side display member 110 will be lost when the member for closing the opening of the projection 19a is removed. There is room for improvement in terms of loss prevention. In addition, in the configuration disclosed in Patent Document 1, for example, when the first mounting member 114 rotates in the circumferential direction of the projecting portion 19a, there is a risk that the first plate-like member 112 faces an unintended direction. There is room for improvement in terms of

The present invention has been made to solve at least one of the above-described problems. To realize an identification tool for a hot water heater or a hot water heater that allows an operator to easily identify a second exposed portion, which is an exposed portion, with a configuration in which loss of members is unlikely to occur and visibility is easily secured stably. and

A hot water supply apparatus according to a first aspect of the present invention includes a gas burner, a housing for housing the gas burner, a water inlet serving as an inlet for water supplied from the outside, and an insertion port serving as an inlet different from the water inlet. and a first conduit having a configuration in which the insertion port protrudes to one side in the left-right direction from the water inlet, a first exposed portion exposed to the outside of the housing, and the water inlet to the outside a water passage through which water flows from the water passage, a heat exchanger that transfers heat generated by the gas burner to the water passing through the water passage to boil water, and a hot water outlet serving as an outlet for the hot water boiled by the heat exchanger and a second exposed portion exposed to the outside of the housing; . The first exposed portion is configured to be detachably inserted into the first pipeline through the insertion port, and includes a filter for filtering water flowing in from the water inlet in the first pipeline, and the insertion port. an insertion port opening/closing member configured to be attached to and detached from the insertion port and configured to open and close the insertion port; The water inlet side display member is formed in a strip shape, is connected to the first pipeline and the insertion port opening/closing member, respectively, and is an inlet constructed between the first pipeline and the insertion port opening/closing member. and a water inlet side display section formed integrally with the water inlet side bridge section and displaying at least one of a symbol or a figure indicating water. The inlet-side display portion is bent in a plate shape from a belt-like predetermined portion of the inlet-side bridge portion, and is oriented so as to face forward.

A hot water supply apparatus according to a second aspect of the present invention includes a gas burner, a housing for housing the gas burner, and a first pipeline having a water inlet serving as an inlet for water supplied from the outside. a first exposed portion exposed to the outside of the body; a water passage through which water flows from the outside through the water inlet; an exchanger, a hot water outlet serving as an outlet for hot water boiled by the heat exchanger, and a drain outlet serving as an outlet different from the hot water outlet, and the water outlet protrudes to one side in the left-right direction from the hot water outlet. A hot water supply apparatus comprising: a second exposed portion that has a second pipeline forming a structure and is exposed to the outside of the housing; . The second exposed portion has a structure that can be attached to and detached from the drain port, and has a drain port opening/closing member that opens and closes the drain port. The outlet-side display member is formed in a strip shape, is connected to the second pipeline and the drain port opening/closing member, respectively, and is installed between the second pipeline and the drain port opening/closing member. and a tap outlet side display section which is formed integrally with the outlet side bridge section and displays at least one of a symbol or a figure indicating hot water. The outlet-side display section has a configuration in which a belt-like predetermined portion of the outlet-side installation section is bent into a plate shape, and is oriented so as to face forward.

A water heater identifier according to a third aspect of the present invention comprises a gas burner, a housing for housing the gas burner, a water inlet serving as an inlet for water supplied from the outside, and an inlet different from the water inlet. a first exposure portion exposed to the outside of the housing, and the water inlet; a water passage through which water that has flowed in from the outside passes through; a heat exchanger that transfers heat generated by the gas burner to the water passing through the water passage to boil water; and an outlet for hot water boiled by the heat exchanger. and a second exposed portion that is exposed to the outside of the housing. The first exposed portion is configured to be detachably inserted into the first pipeline through the insertion port, and includes a filter for filtering water flowing in from the water inlet in the first pipeline, and the insertion port. and an insertion port opening/closing member configured to be detachable from the insertion port and configured to open and close the insertion port. The identification tool for the water heater is configured in a belt shape, is connected to the first pipeline and the insertion port opening/closing member, respectively, and is a water inlet constructed between the first pipeline and the insertion port opening/closing member. and a water inlet side display section formed integrally with the water inlet side bridge section and displaying at least one of a symbol or a figure indicating water. The inlet-side display portion is bent in a plate shape from a belt-like predetermined portion of the inlet-side bridge portion, and is oriented so as to face forward.

A fourth aspect of the present invention is an identification tool for a water heater, which includes a gas burner, a housing for housing the gas burner, and a first pipeline having a water inlet serving as an inlet for water supplied from the outside. a first exposed portion exposed to the outside of the housing; a water passage through which water flows from the outside through the water inlet; and heat generated by the gas burner is transferred to water passing through the water passage. A heat exchanger for boiling hot water, a hot water outlet serving as an outlet for the hot water boiled by the heat exchanger, and a water drain outlet serving as an outlet different from the hot water outlet, and the water outlet is located in a lateral direction from the hot water outlet. The identification tool for a hot water supply apparatus includes a second exposed portion that has a second pipe line projecting to one side and that is exposed to the outside of the housing. The second exposed portion is detachable with respect to the drain port, and has a drain port opening/closing member for opening and closing the drain port. The identification tool for the hot water supply device is configured in a strip shape, is connected to the second pipeline and the drain port opening/closing member, respectively, and has a hot water outlet constructed between the second pipeline and the drain port opening/closing member. and a tap outlet side display section integrally formed with the outlet side bridge section and displaying at least one of a symbol or a figure indicating hot water. The outlet-side display section has a configuration in which a belt-like predetermined portion of the outlet-side installation section is bent into a plate shape, and is oriented so as to face forward.

According to the first aspect and the third aspect, since the posture is determined so that the water inlet side display portion faces the front side, the water inlet side display portion is displayed when the operator views the hot water supply apparatus from the front side. The display becomes easier to see. In particular, since the inlet-side installation portion is connected to both the first pipeline and the insertion port opening/closing member, it is difficult for the inlet-side installation portion to rotate in the circumferential direction of the first pipeline or the insertion port opening/closing member. It becomes easier to stably maintain the posture in which the water port side display portion faces the front side. In addition, by providing the inlet-side display part so as to bend into a plate shape from the belt-shaped predetermined part of the inlet-side installation part, the above effect can be obtained, and the structure that stably ensures visibility can be made simpler. realizable. Furthermore, even if the insertion port opening/closing member is removed, the water inlet side display member is maintained in a state of being connected to the first pipe line by the water inlet side bridging portion. It is hard to lose it with the removal of

According to the second aspect and the fourth aspect, since the posture is determined so that the outlet side display part faces the front side, when the operator views the hot water supply apparatus from the front side, the outlet side display part The display becomes easier to see. In particular, due to the structure in which the outlet-side installation part is connected to both the second pipeline and the drain port opening/closing member, it is difficult for the outlet-side installation part to rotate in the circumferential direction of the second pipeline or the drain port opening/closing member. The posture in which the sprue-side display part faces the front side can be stably maintained. In addition, by providing the outlet-side display portion so as to bend into a plate-like shape from the belt-shaped predetermined portion of the outlet-side installation portion, the above effect can be obtained, and the configuration that stably ensures visibility can be made simpler. realizable. Furthermore, even if the drain port opening/closing member is removed, the tap outlet side display portion is maintained in a state of being connected to the first pipe line by the tap tap side installation portion. It is hard to lose it with the removal of

FIG. 1 is a front view schematically showing the appearance of the water heater according to the first embodiment. 2 is a circuit diagram schematically showing a hot water supply circuit of the hot water supply apparatus of FIG. 1. FIG. FIG. 3 is a front view showing how the first identification device and the second identification device according to the first embodiment are attached to the hot water supply apparatus, with a part of the housing omitted. FIG. 4 is an exploded perspective view showing the first exposed portion and the first identifier. FIG. 5 is an exploded perspective view showing the second exposed portion and the second identifier.

<Example 1>
Hereinafter, Example 1 showing an example of the invention will be described with reference to the drawings. In FIG. 1 , the left-right direction is the left-right direction of water heater 1 , the up-down direction is the up-down direction of water heater 1 , and the near side is the front of water heater 1 . Specifically, the vertical direction of water heater 1 is the vertical direction when water heater 1 is installed, and is the longitudinal direction of housing 3 when viewed from the front as shown in FIG. The front-rear direction of the water heater 1 is the thickness direction of the box-shaped housing 3 among the directions orthogonal to the up-down direction. Specifically, the side of the housing 3 where the exhaust port 3B is formed is the front side. The horizontal direction of the hot water supply apparatus 1 is a direction orthogonal to the vertical direction and the front-rear direction, and corresponds to the lateral direction of the housing 3 when viewed from the front as shown in FIG. In the example of FIG. 1, the direction in which the first exposed portion 100 and the second exposed portion 200 are arranged is the horizontal direction. Specifically, the wall portion of the housing 3 that is attached so as to face the installation target (for example, the wall of a building, etc.) is the rear wall portion (back wall), and the wall portion that faces the rear wall portion. is the front wall portion 3A, and the direction in which the front wall portion 3A and the rear wall portion face each other is the front-rear direction. An exhaust port 3B is formed in the front wall portion 3A so as to extend in the left-right direction.

The hot water supply apparatus 1 includes a housing 3 that accommodates the components that make up the hot water supply circuit 2, and has an appearance as shown in FIG. The housing 3 has a substantially box shape, and is attached to the wall surface of a building by fixing mounting plates 9 protruding upward and downward to the wall surface with screws or the like. The hot water supply circuit 2 includes a water inlet pipe 21, a hot water outlet pipe 23, a gas burner 4, a heat exchanger 6, and the like, and functions as a path for heating and discharging tap water supplied from the outside (see FIG. 2). The hot water supply device 1 communicates with the water inlet pipe 21 on the upstream side of the hot water supply circuit 2 and communicates with the first exposed portion 100 exposed to the outside of the housing 3 and the hot water supply pipe 23 on the downstream side of the hot water supply circuit 2, and a second exposed portion 200 exposed to the outside of the housing 3 . The first exposed portion 100 and the second exposed portion 200 are provided so as to protrude from the outer surface of the housing 3 (the lower surface in the first embodiment).

As shown in FIG. 2 , in the hot water supply circuit 2, a pipe line constituted by a water inlet pipe 21, a heat transfer pipe 22, and a hot water outlet pipe 23 functions as a water conduit. The water inlet pipe 21 is configured as a path into which water from the water inlet 111 flows. Hot water outlet pipe 23 is configured as a path for sending out hot water to hot water outlet 211 . The gas burner 4 is a part that burns combustion gas to generate heat. Gas is supplied to the gas burner 4 from the outside through a gas pipe 5 . The heat exchanger 6 is a part that transfers the heat generated by the gas burner 4 to the water passing through the water passage (pipe line composed of the water inlet pipe 21, the heat transfer pipe 22, and the hot water outlet pipe 23) to boil water. The heat exchanger 6 is provided at the position of the heat transfer tube 22 in the middle of the water passage. A water inlet pipe 21 is connected to the upstream side of the heat transfer pipe 22 to supply tap water, and a hot water outlet pipe 23 is connected to the downstream side of the heat transfer pipe 22 to discharge heated hot water.

As shown in FIG. 2 , the hot water supply apparatus 1 is provided with a bypass pipe 24 as a water flow path that bypasses between the water inlet pipe 21 and the hot water outlet pipe 23 , and the bypass pipe 24 is provided with a bypass valve 25 . In the water inlet pipe 21, a water flow rate control valve (not shown) is provided on the upstream side of the branching position of the bypass pipe 24, and the water flow rate control valve allows the water inlet pipe 21 to be opened in various ways between a closed state and a fully open state. It has a configuration that can be changed continuously every time.

As shown in FIG. 1, the first exposed portion 100 of the water heater 1 is provided with a first identifier 130 (water inlet side display member, identifier for the water heater) representing at least one of a symbol or a figure indicating water. installed. Further, the second exposed portion 200 of the hot water supply apparatus 1 is provided with a second identification tool 230 (hot water outlet side display member, identification tool for hot water supply apparatus) representing at least one of a symbol or a figure indicating hot water. .

As shown in FIG. 3, the first exposed portion 100 includes a first pipeline 110 having a water inlet 111 serving as an inlet for water supplied from the outside and an insertion port 115 serving as an inlet different from the water inlet 111. have The insertion port 115 is used as an opening for attaching and detaching a filter 125, which will be described later, and is also used as an opening for removing water from the water passage.

The first pipe line 110 has a configuration in which an insertion port 115 protrudes from the water inlet 111 to one side in the left-right direction (substantially to the right in the first embodiment). Specifically, as shown in FIG. 4, the first pipeline 110 has a water inlet side tubular portion 112 extending in the vertical direction and an insertion port side tubular portion 116 extending in the horizontal direction, A water passage that bends in an L shape is formed. The water inlet-side cylindrical portion 112 has a water inlet 111 at its lower portion, and the water inlet 111 is connected to a first external pipe line 190 configured as a pipe line for supplying water from a tap, for example. A male threaded portion 113 for connecting the first external conduit 190 is provided on the outer peripheral surface of the water inlet 111 . The insertion port side cylindrical portion 116 has an insertion port 115 at the end opposite to the side communicating with the water inlet side cylindrical portion 112 . The insertion port-side tubular portion 116 has a communication port 117 that communicates with the water inlet pipe 21 and is configured to guide the water flowing in from the water inlet port 111 through the communication port 117 to the water inlet pipe 21 side.

The first exposed part 100 is detachably attached to the filter 125 for filtering the water that has flowed through the water inlet 111 in the first conduit 110 and the insertion port 115 . a member 120; The filter 125 is configured to be attached to and detached from the first pipeline 110 through the insertion port 115 . Specifically, the filter 125 has a cylindrical outer shape, one end of which is fixed to the insertion opening/closing member 120, and is attached/detached into/from the first conduit 110 as the insertion opening/closing member 120 is attached/detached. It has a configuration that When the filter 125 is attached to the first pipe line 110, it is located in front of the communication port 117, and allows the water flowing in from the water inlet 111 to move to the water inlet pipe 21 side and mix with the water. It functions to prevent foreign matter from moving to the water inlet pipe 21 side. The insertion port opening/closing member 120 includes a knob portion 121 and a groove portion 123 that is recessed radially inward from the knob portion 121 . The groove portion 123 is a portion into which a connecting portion 134, which will be described later, is fitted. The insertion port opening/closing member 120 is allowed to rotate with the connecting portion 134 fitted in the groove portion 123 and can be screwed to the insertion port 115 .

As shown in FIG. 3 , the first identifier 130 includes a first bridging portion 131 (a water inlet side bridging portion) constructed between the first pipeline 110 and the insertion port opening/closing member 120, and a first bridging portion 131 and a first display portion 137 (water inlet side display portion) that is formed integrally with and displays at least one of a symbol or a figure indicating water. The first identification tool 130 is made of, for example, a flexible resin material. In the state before the first identification tool 130 is attached to the first exposed portion 100, the first bridge portion 131 has an elongated flat plate shape, and the first display portion 137 extends from the center of the first bridge portion 131 in the longitudinal direction. It is molded in a bent shape.

The first bridging portion 131 is formed in a strip shape, and is connected to the first pipe line 110 and the insertion port opening/closing member 120 respectively. Specifically, as shown in FIG. 4, the first bridging portion 131 has a connecting portion 132 connected to the first conduit 110 at one end in the longitudinal direction, and is connected to the insertion port opening/closing member 120 at the other end. It has a connecting portion 134 that The connecting portion 132 has an annular shape with a through hole 133 that is one size larger than the first pipe line 110, and a part of the through hole 133 extends longitudinally inward in a slit shape. The connecting portion 132 is configured to pass through the externally threaded portion 113 with elastic deformation and to be connected to the vicinity of the upper portion of the externally threaded portion 113 . The connecting portion 134 has an annular shape with a through hole 135 that is one size larger than the groove portion 123 of the insertion port opening/closing member 120, and a part of the through hole 135 extends longitudinally inward in a slit shape. The connection portion 134 is configured to allow the knob portion 121 to pass through with elastic deformation and to be connected to the groove portion 123 .

As shown in FIGS. 3 and 4, the first bridging portion 131 is bent in a substantially U shape with the connecting portions 132 and 134 connected to the first conduit 110 and the insertion port opening/closing member 120, respectively. erected in The first bridging portion 131 has a sufficient extra length to allow opening and closing of the insertion port 115 by the insertion port opening/closing member 120 in a state where the first conduit 110 and the insertion port opening/closing member 120 are connected. When the insertion opening/closing member 120 is attached to the insertion opening 115, the extra length is bent. The normal posture of the first bridging portion 131 is such that the connecting portions 132 and 134 are directed upward and the central portion in the longitudinal direction is directed downward. In the normal posture, the first bridging portion 131 is in a posture in which the front and back surfaces of the portion where the first display portion 137 is connected face up and down. In addition, in the first embodiment, when the first bridging portion 131 is bent in a substantially U shape, elastic force is generated in the direction in which both ends are opened. For this reason, the first bridging portion 131 is less likely to rotate in the circumferential direction of the first pipe line 110 (inlet-side cylindrical portion 112) and the insertion port opening/closing member 120, and is easily maintained in a normal posture.

The first display portion 137 has a rectangular plate shape in plan view, and has a plurality of holes 138 formed so as to penetrate in the thickness direction to display a symbol indicating water (specifically, a kanji for “water”). It is written. Specifically, the part representing the second stroke of the Chinese character for "water" and the parts representing the first, third, and fourth strokes are formed as separate holes. In the first embodiment, the surface portion of the first display portion 137 is represented in a first color (for example, a cold color such as blue), and the first exposed portion 100 can be easily identified by the color. there is

As shown in FIG. 3 , the first display portion 137 has a configuration in which a predetermined band-like portion of the first bridging portion 131 is bent into a plate shape, and is oriented so as to face forward. In the first identification tool 130 , the band-shaped predetermined portion of the first bridging portion 131 is the central portion of the first bridging portion 131 . This predetermined portion is appropriately determined according to the shape, posture, etc. of the first exposed portion 100 to which the first identification tool 130 is attached. In addition, the posture in which first display unit 137 faces forward is not limited to the posture in which first display unit 137 is perpendicular to the front-rear direction of water heater 1 . A posture in which the first display unit 137 is tilted with respect to the front-rear direction to such an extent that the symbols and the like can be visually recognized is also included. In the first embodiment, the first display portion 137 extends downward from the front end of the central portion of the first bridging portion 131 and is oriented such that its plate surface faces forward.

As shown in FIG. 3 , the second exposed portion 200 includes a hot water outlet 211 serving as an outlet for hot water boiled by the heat exchanger 6 and a drain outlet 215 serving as an outlet different from the hot water outlet 211 . It has a pipeline 210 .

The second pipeline 210 has a structure in which a drain port 215 protrudes to one side in the left-right direction (substantially to the right in the first embodiment) from the hot water outlet 211 . Specifically, as shown in FIG. 5 , the second pipe line 210 includes a tap outlet side cylindrical portion 212 extending along the vertical direction and a drain port extending obliquely downward to the right in a form branched from the tap outlet side cylindrical portion 212 . and a mouth-side tubular portion 216 . The hot water outlet side cylindrical portion 212 has a communication port 217 communicating with the hot water outlet pipe 23 at its upper portion, and has a hot water outlet 211 at its lower portion. The hot water outlet 211 is connected to, for example, a second external pipeline 290 configured as a pipeline for supplying hot water in the building. A male threaded portion 213 for connecting the second external pipeline 290 is provided on the outer peripheral surface of the hot water outlet 211 . The hot water outlet side cylindrical portion 212 is configured to guide the hot water flowing from the communication opening 217 to the second external pipe line 290 from the hot water outlet 211 . The drain port side tubular portion 216 has a drain port 215 at the end opposite to the side communicating with the hot water outlet side tubular portion 212 .

The second exposed portion 200 is detachable from the drain port 215 and has a drain port opening/closing member 220 for opening and closing the drain port 215 . The drain port opening/closing member 220 includes a knob portion 221 and a groove portion 223 that is recessed radially inward from the knob portion 221 . The groove portion 223 is a portion into which a connecting portion 234, which will be described later, is fitted. The drain port opening/closing member 220 is allowed to rotate while the connecting portion 234 is fitted in the groove portion 223 .

As shown in FIG. 3 , the second identifier 230 includes a second installation portion 231 (installation portion on the outlet side) installed between the second pipeline 210 and the drain port opening/closing member 220, and a second installation portion 231 and a second display section 237 (the hot water outlet side display section) that is integrally formed with and displays at least one of a symbol or a figure indicating hot water. The second identification tool 230 is made of, for example, a flexible resin material. In the state before the second identification tool 230 is attached to the second exposed portion 200, the second bridging portion 231 has an elongated flat plate shape, and the second display portion 237 is a connecting portion 234 in the longitudinal direction of the second bridging portion 231. It is formed in a shape that bends from the side portion (the portion near the portion connected to the drain port opening/closing member 220).

The second bridging portion 231 is formed in a strip shape and is connected to the second pipeline 210 and the drain port opening/closing member 220 respectively. Specifically, as shown in FIG. 5, the second bridging portion 231 has a connecting portion 232 connected to the second pipe line 210 at one end in the longitudinal direction, and is connected to the drain port opening/closing member 220 at the other end. It has a connecting portion 234 that The connecting portion 232 has an annular shape with a through hole 233 that is one size larger than the second pipe line 210, and a part of the through hole 233 extends longitudinally inward in a slit shape. The connecting portion 232 is configured to pass through the externally threaded portion 213 with elastic deformation and to be connected to the vicinity of the upper portion of the externally threaded portion 213 . The connecting portion 234 has an annular shape with a through hole 235 that is one size larger than the groove portion 223 of the drain port opening/closing member 220, and a portion of the through hole 235 extends longitudinally inward in a slit shape. The connecting portion 234 is configured to allow the knob portion 221 to pass through with elastic deformation and to be connected to the groove portion 223 .

As shown in FIGS. 3 and 5, the second bridging portion 231 is bent in a substantially U shape with the connecting portions 232 and 234 connected to the second pipe 210 and the drain port opening/closing member 220, respectively. erected in The second bridging portion 231 has an extra length that allows opening and closing of the drain port 215 by the drain port opening/closing member 220 in a state where the second conduit 210 and the drain port opening/closing member 220 are connected. When the drain port opening/closing member 220 is attached to the drain port 215, the extra length is bent. A normal posture of the second bridging portion 231 is such that a portion near the connecting portion 232 and a portion near the connecting portion 234 face each other and extend in the vertical direction with the connecting portions 232 and 234 facing upward. In the normal posture, the second bridging portion 231 is in a posture in which the front and back surfaces of the portion where the second display portion 237 is connected face left and right. Further, in the first embodiment, when the second bridging portion 231 is bent in a substantially U shape, elastic force is generated in the direction in which both ends are opened. Therefore, the second installation portion 231 is less likely to rotate in the circumferential direction of the second pipe line 210 (the hot water outlet side cylinder portion 212) and the drain port opening/closing member 220, and is easily maintained in a normal posture.

The second display portion 237 has a rectangular plate shape in plan view, and a symbol indicating hot water (specifically, hiragana of “Yu”) is displayed by a plurality of holes 238 formed so as to penetrate in the thickness direction. It is written. Specifically, the hiragana character "Yu" is divided into three parts, each of which is formed as a hole. In the first embodiment, the surface portion of the second display portion 237 is displayed in a second color (for example, a warm color such as orange), and the second exposed portion 200 can be easily identified by the color. there is

As shown in FIG. 3, the second display portion 237 has a configuration in which a predetermined band-shaped portion of the second bridging portion 231 is bent into a plate shape, and is oriented so as to face forward. In the second identification tool 230 , the strip-shaped predetermined portion of the second bridging portion 231 is a portion of the second bridging portion 231 near the connecting portion 234 . This predetermined portion is appropriately determined according to the shape, posture, etc. of the second exposed portion 200 to which the second identification tool 230 is attached. The posture in which second display portion 237 faces the front side is not limited to the posture in which second display portion 237 is perpendicular to the front-rear direction of water heater 1 . A posture in which the second display unit 237 is tilted with respect to the front-rear direction to such an extent that the symbols and the like can be visually recognized is also included. In the first embodiment, the second display portion 237 extends rightward from the front end of the portion near the connecting portion 234 of the second bridging portion 231, and is oriented so that its plate surface faces forward. .

Next, the effect of this configuration will be illustrated.
According to this configuration, the first display portion 137 is bent into a plate shape from the belt-like predetermined portion of the first bridging portion 131, and is oriented so as to face the front side. Visibility is ensured, and the first pipeline 110 and the second pipeline 210 can be reliably identified. In addition, since the first bridging portion 131 is connected to both the first pipe line 110 and the insertion port opening/closing member 120, the first bridging portion 131 rotates in the circumferential direction of the first pipe line 110 or the insertion port opening/closing member 120. This makes it possible to preferably maintain the posture in which the first display unit 137 faces forward. Furthermore, according to this configuration, even when the insertion opening/closing member 120 is removed, the first bridge portion 131 is connected to the first pipe line 110, so that the first identification tool 130 is connected to the insertion opening/closing member 120. It is hard to lose it with the removal of

Further, according to this configuration, the second display portion 237 has a configuration in which the second display portion 237 is bent into a plate shape from a predetermined belt-like portion of the second bridge portion 231, and is oriented so as to face the front side. 237 can be ensured, and the first pipeline 110 and the second pipeline 210 can be reliably identified. In addition, since the second installation portion 231 is connected to both the second pipeline 210 and the drain port opening/closing member 220, the second installation portion 231 rotates in the circumferential direction of the second pipeline 210 or the drain port opening/closing member 220. The posture in which the second display unit 237 faces forward can be preferably maintained. Furthermore, according to this configuration, even when the drain port opening/closing member 220 is removed, the second installation portion 231 is connected to the first pipe line 110, so that the second identifier 230 is connected to the drain port opening/closing member 220. It is hard to lose it with the removal of

For example, if the first external pipe line 190 and the second external pipe line 290 are mistakenly connected, the first external pipe line is connected to the outlet (outlet port 211) of the hot water discharge pipe 23, which is a pipe line in which the filter 125 does not exist. 190 is erroneously connected, and if water is supplied from the first external pipe line 190 in this state, foreign matter mixed in the water will enter the hot water supply apparatus through the hot water outlet pipe 23. There is fear. However, if the first identification tool 130 and the second identification tool 230 described above are used, the person concerned can reliably confirm which is the pipeline related to water and which is the pipeline related to hot water. It is possible to prevent erroneous connection, and by extension, effectively prevent foreign matter from entering due to erroneous connection.

<Other Examples>
Various modifications may be made to the above-described embodiments, and various configurations may be added. Another embodiment will be briefly described below.

In the above-described embodiment, the configuration including both the first identification tool 130 and the second identification tool 230 was exemplified. good. For example, when only the first exposed portion and the second exposed portion are provided as the pipeline exposed to the outside, if one of the pipelines can be identified by one of the identifiers, the other pipeline can also be identified by the first external portion. It is possible to confirm which of the pipeline and the second external pipeline should be connected. In addition, even if three or more pipelines are provided as pipelines exposed to the outside, for example, the first identifier or the second identifier can be attached to the pipelines whose markings on the pipeline itself are difficult to see. As a result, erroneous connection to each pipeline is less likely to occur.

In the above-described embodiment, the hot water supply apparatus has a single hot water supply circuit 2, but the hot water supply apparatus is, for example, a bath/hot water supply system having a function of supplying hot water to a bathtub and a function of heating water in the bathtub. It may be configured as a system and include a hot water supply side circuit and a bath side circuit.

In addition to the embodiments described above, the configuration for connecting the first identification tool 130 to the first conduit 110 and the insertion port opening/closing member 120, the connection position, etc. can be changed as appropriate. Also, the configuration for connecting the second identifier 230 to the second pipe 210 and the drain port opening/closing member 220, the connection position, etc. can be changed as appropriate. For example, the first bridging portion may have C-shaped hook portions at both ends in the longitudinal direction, and the hook portions may be hooked to the first conduit and the insertion port opening/closing member.

In the above-described embodiment, the configuration in which the first bridging portion 131 is bent in a substantially U-shape is illustrated, but the posture of the first bridging portion is not limited to this. In addition, although the configuration in which the second bridging portion 231 is bent in a substantially U-shaped configuration has been exemplified, the posture of the second bridging portion is not limited to this.

In addition to the above-described embodiments, the position at which the first display portion 137 is bent from the first bridging portion 131 , the angle at which the first display portion 137 is bent, and the like can be appropriately changed according to the shape and posture of the first exposed portion 100 . Further, the position at which the second display portion 237 is bent from the second bridge portion 231 , the angle at which the second display portion 237 is bent, and the like can be appropriately changed according to the shape and posture of the second exposed portion 200 .

DESCRIPTION OF SYMBOLS 1... Hot-water supply apparatus 3... Housing 4... Gas burner 6... Heat exchanger 21... Water inlet pipe (water passage)
22 ... heat transfer tube (water passage)
23 ... hot water pipe (water passage)
DESCRIPTION OF SYMBOLS 100... 1st exposure part 110... 1st pipe line 111... Water inlet 115... Insertion port 120... Insertion port opening/closing member 125... Filter 130... 1st identification tool (water inlet side display member, identification tool for water heater)
131... The 1st installation part (water inlet side installation part)
137... First display unit (water inlet side display unit)
DESCRIPTION OF SYMBOLS 200... 2nd exposure part 210... 2nd pipe line 211... Hot water outlet 215... Drainage opening 220... Drainage opening opening/closing member 230... 2nd identification tool (drainage outlet side display member, identification tool for water heater)
231 . . . Second installation section (installation section on outlet side)
237 . . . Second display section (display section on outlet side)

Claims (2)

a gas burner;
a housing that houses the gas burner;
A first pipeline having a water inlet serving as an inlet for water supplied from the outside and an insertion port serving as an inlet different from the water inlet, and the insertion port protruding to one side in the left-right direction from the water inlet. and a first exposed portion exposed to the outside of the housing;
a water passage through which water flows from the outside through the water inlet;
a heat exchanger that transfers heat generated by the gas burner to water passing through the water passage to boil water;
a second exposed portion having a second pipe line provided with a hot water outlet serving as an outlet for hot water boiled by the heat exchanger and exposed to the outside of the housing;
a water inlet side display member representing at least one of a symbol or a figure indicating water;
A water heater comprising
The first exposed portion is
a filter configured to be attached to and detached from the first conduit through the insertion port, for filtering water flowing in from the water inlet in the first conduit;
an insertion port opening/closing member configured to be detachable from the insertion port and configured to open and close the insertion port;
has
The water inlet side display member,
a water inlet-side installation portion configured in a belt shape, connected to the first pipeline and the insertion port opening/closing member, respectively, and installed between the first pipeline and the insertion port opening/closing member;
an inlet-side display section formed integrally with the inlet-side installation section and displaying at least one of a symbol or a figure indicating water;
has
The inlet-side display portion is bent into a plate shape from a belt-like predetermined portion of the inlet-side installation portion, and is oriented so as to face forward. a gas burner;
a housing that houses the gas burner;
a first exposed portion having a first pipeline having a water inlet serving as an inlet for water supplied from the outside and exposed to the outside of the housing;
a water passage through which water flows from the outside through the water inlet;
a heat exchanger that transfers heat generated by the gas burner to water passing through the water passage to boil water;
A hot water outlet serving as an outlet for hot water boiled by the heat exchanger and a drain outlet serving as an outlet different from the hot water outlet are provided, and the water outlet protrudes to one side in the left-right direction from the hot water outlet. a second exposed portion having two ducts and exposed to the outside of the housing;
a outlet-side display member representing at least one of a symbol or a figure indicating hot water;
A water heater comprising
The second exposed portion is
Having a drain port opening/closing member configured to be attached to and detached from the drain port and opening and closing the drain port,
The outlet-side display member is
an outlet-side installation portion configured in a belt shape, connected to the second pipeline and the drain port opening/closing member, respectively, and installed between the second pipeline and the drain port opening/closing member;
a tapping port side display portion integrally formed with the tapping port side construction portion and displaying at least one of a symbol or a figure indicating hot water;
has
The hot water supply apparatus, wherein the outlet-side display section is formed by bending a predetermined band-shaped portion of the outlet-side installation section into a plate shape, and is oriented so as to face forward.

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